Intrapericardial neuroendocrine tumour in a dog |
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| Institution: | 1. Department of Clinical Studies, Ontario Veterinary College, University of Guelph, 50 Stone Road E., Guelph, Ontario, N1G 2W1, Canada;2. Department of Pathobiology, Ontario Veterinary College, University of Guelph, 419 Gordon St., Guelph, Ontario, N1G 2W1, Canada;3. Mississauga Oakville Veterinary Emergency and Specialty Hospital, 2285 Bristol Circle, Oakville, Ontario, L6H 6P8, Canada;1. Department of Veterinary Medical Sciences, Alma Mater Studiorum - University of Bologna, Via Tolara di Sopra 50, 40064 Ozzano dell’Emilia, Italy;2. Virtual Veterinary Specialists Ltd, West Sussex, UK;3. Division of Cardiology, Vetsuisse Faculty University of Zurich, Winterthurerstrasse 260, 8057, Zurich, Switzerland;1. Small Animal Teaching Hospital, University of Liverpool, Leahurst Campus, Chester High Road, Neston, Cheshire, CH64 7TE, UK;2. Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Leahurst Campus, Chester High Road, Neston, Cheshire, CH64 7TE, UK;1. Cardiac Electrophysiology Section, Division of Cardiovascular Medicine, Hospital of the University of Pennsylvania, 3400 Civic Center Blvd, Philadelphia, PA 19104, USA;2. Department of Clinical Sciences and Advanced Medicine, School of Veterinary Medicine, University of Pennsylvania, 3800 Spruce St, Philadelphia, PA 19104, USA;1. Laboratory of Veterinary Internal Medicine, Department of Veterinary Clinical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, N18 W9, Sapporo, Hokkaido, 060-0818, Japan;2. Laboratory of Veterinary Internal Medicine, Department of Veterinary Sciences, Faculty of Agriculture, University of Miyazaki, 1-1 Gakuenkibanadai-nishi, Miyazaki, 889-2192, Japan |
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| Abstract: | An 11-year-old neutered male Border Terrier presented for pericardiectomy after a nine-month history of tricavitary effusion, dyspnoea and lethargy. Transthoracic echocardiography revealed a fluid-filled structure at the heart base, starting at the mid-right ventricle and extending to the middle of the right atrium. Almost complete compression of the right atrium and the cranial vena cava was noted. Thoracic computed tomography revealed a heterogeneously enhancing and poorly marginated mass within the cranial aspect of the pericardium. A median sternotomy and subtotal pericardiectomy were performed. A non-distinct fluid-filled structure within the pericardium adhered to the epicardium was visualised. The structure was removed via marsupialisation along with extirpation of enlarged sternal lymph nodes. Histopathological examination of the sternal lymph nodes revealed expansile, well-demarcated, unencapsulated nodules of neoplastic cells consistent with a neuroendocrine tumour suspected to be thyroid in origin. After surgery, intractable pleural effusion resulted in euthanasia. Intrapericardial ectopic thyroid tumours are rarely reported in animals. The location of the mass and unusual presentation may have made it challenging for echocardiography to identify this neoplasia. Thoracic computed tomography at an earlier stage may have identified the neoplasia and potentially allowed for surgical intervention. |
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| Keywords: | Pericardial effusion Ectopic thyroid Median sternotomy Pericardectomy Neoplasia |
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